Schraubenverdichter und Kältekompressoreinheit mit diesem

Details

Veröffentlichungs-Nr.

EP2505841

Aktenzeichen

EP12150421

Anmeldetag

9. Januar 2012

Veröffentlichung

31. Mai 2017

Erteilung

31. Mai 2017

Rechtsraum

EP

IPC

F04C18/16F04C28/12

Abstract

Screw compressor (130) including a valve hole (28) formed at a discharge side end surface of the discharge casing (16) and at a position opening to a compression work chamber (36A, 36B); a bypass flow path (29) connecting the valve hole and a discharge chamber with each other; and a valve body (31) arranged in the valve hole; cylinder chambers (35, 70) provided on a rear surface side of the valve body (31); a piston (51) reciprocally moving in the cylinder chambers; a rod (53) connecting the piston (51) and the valve body (31); communication paths (81, 120, 121, 83, 84, 85, 86, 112) for introducing a fluid on a discharge side into the cylinder chambers; a pressure discharge path (80, 80a, 80b, 85, 86, 112) for discharging to a suction side the fluid introduced into the cylinder chambers; a plurality of valve means (42, 43) provided at the pressure discharge path or the communication path and changing pressure in the cylinder chambers; and a controller (113) controlling the plurality of valves means to open the valve body upon detecting over-compression and close the valve body upon not detecting the over-compression.

Anmelder

Firmen

Hitachi-Johnson Controls Air Conditioning, Inc.
Johnson Controls-Hitachi Air Conditioning Technology (Hong Kong) Limited
Hitachi Appliances, Inc.

Land

🇯🇵 Japan

Fachgebiete